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A dc generator is operating at constant speed and constant field excitation. If it is supplying maximum power at a voltage of 220 V then the generated

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A dc generator is operating at constant speed and constant field excitation. If it is supplying maximum power at a voltage of 220 V then the generated emf
1. Is 110 V
2. Is 220 V
3. Is 440 V
4. Depends upon the armature resistance
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Correct Answer - Option 3 : Is 440 V

Concept:

In dc generator, maximum power occurs when the generated emf 

Eg = 2V

Eg = generated emf

V = terminal voltage

Calculation:

Given that terminal voltage V = 220 V

Eg = 2V

Generated emf Eg = 2 × 220 = 440 V

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